Configuring audio outputs

Audio outputs are devices which actually play the audio chunks produced by MPD. You can configure any number of audio output devices, but there must be at least one. If none is configured, MPD attempts to auto-detect. Usually, this works quite well with ALSA, OSS and on Mac OS X.

To configure an audio output manually, add an audio_output block to mpd.conf:

audio_output {
    type "alsa"
    name "my ALSA device"
    device "hw:0"
}
      

The following table lists the audio_output options valid for all plugins:

Name Description
type The name of the plugin.
name The name of the audio output. It is visible to the client. Some plugins also use it internally, e.g. as a name registered in the PULSE server.
format

Always open the audio output with the specified audio format (samplerate:bits:channels), regardless of the format of the input file. This is optional for most plugins.

Any of the three attributes may be an asterisk to specify that this attribute should not be enforced, example: 48000:16:*. *:*:* is equal to not having a format specification.

The following values are valid for bits: 8 (signed 8 bit integer samples), 16, 24 (signed 24 bit integer samples padded to 32 bit), 32 (signed 32 bit integer samples), f (32 bit floating point, -1.0 to 1.0).

enabled yes|no Specifies whether this audio output is enabled when MPD is started. By default, all audio outputs are enabled.
tags yes|no If set to "no", then MPD will not send tags to this output. This is only useful for output plugins that can receive tags, for example the httpd output plugin.
always_on yes|no If set to "yes", then MPD attempts to keep this audio output always open. This may be useful for streaming servers, when you don't want to disconnect all listeners even when playback is accidentally stopped.
mixer_type hardware|software|none Specifies which mixer should be used for this audio output: the hardware mixer (available for ALSA, OSS and PulseAudio), the software mixer or no mixer ("none"). By default, the hardware mixer is used for devices which support it, and none for the others.
replay_gain_handler software|mixer|none Specifies how replay gain is applied. The default is "software", which uses an internal software volume control. "mixer" uses the configured (hardware) mixer control. "none" disables replay gain on this audio output.